S
M
T
W
T
F
S
30
56°
37°
31
59°
43°
1
56°
44°
2
57°
43°
3
55°
38°
4
55°
40°
5
56°
35°
6
57°
38°
7
56°
36°
8
59°
39°
9
53°
40°
10
54°
38°
11
52°
39°
12
51°
40°
13
52°
36°
14
53°
40°
15
52°
41°
16
59°
42°
17
60°
40°
18
57°
39°
19
56°
38°
20
51°
35°
21
51°
34°
22
50°
33°
23
48°
36°
24
48°
36°
25
47°
35°
26
47°
36°
27
48°
31°
28
48°
30°
29
46°
32°
30
46°
35°
1
44°
36°
2
46°
36°
3
48°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Whitehorse
Whitehorse's September 2026 forecast shows daily high temperatures ranging from 44° to 60°, with overnight lows between 30° and 44°. The average high for September is 52° with an average low of 37°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Whitehorse. See also: October | November | December.
